Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 30-10-2023 and time 02:43:40 (UTC) in region 4 km W Premilcuore (FC)

A magnitude ML 1.8 earthquake occured in region: 4 km W Premilcuore (FC), on

  • 30-10-2023 02:43:40 (UTC)
  • 30-10-2023 03:43:40 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.9890, 11.7280 at 8 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Premilcuore FC 4 799 799
Portico e San Benedetto FC 6 756 1555
Tredozio FC 10 1212 2767
San Godenzo FI 11 1167 3934
Rocca San Casciano FC 12 1910 5844
Marradi FI 13 3139 8983
Galeata FC 15 2516 11499
Santa Sofia FC 15 4136 15635
Civitella di Romagna FC 17 3786 19421
Londa FI 19 1840 21261
Modigliana FC 20 4560 25821
Dicomano FI 20 5515 31336
Dovadola FC 20 1653 32989
Palazzuolo sul Senio FI 20 1154 34143

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SW of Faenza (58541 inhabitants)
36 Km SW of Forlì (117913 inhabitants)
41 Km S of Imola (69797 inhabitants)
44 Km W of Cesena (96758 inhabitants)
45 Km NE of Firenze (382808 inhabitants)
51 Km NE of Scandicci (50609 inhabitants)
52 Km E of Prato (191150 inhabitants)
59 Km N of Arezzo (99543 inhabitants)
61 Km SW of Ravenna (159116 inhabitants)
64 Km SE of Bologna (386663 inhabitants)
65 Km E of Pistoia (90315 inhabitants)
68 Km W of Rimini (147750 inhabitants)
81 Km NE of Siena (53903 inhabitants)
95 Km S of Ferrara (133155 inhabitants)
95 Km W of Pesaro (94582 inhabitants)
97 Km SE of Modena (184973 inhabitants)
99 Km E of Lucca (89046 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.8 2023-10-30
02:43:40		 43.9888 11.7277 8 2023-10-30
02:56:27		 Sala Sismica INGV-Roma 122564911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-30 02:43:40 ± 0.07
Latitude 43.9888 ± 0.0036
Longitude 11.7277 ± 0.0037
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 122564911

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 314
Semi-minor axis of confidence ellipse (meter) 291
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 346
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 51
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.60704
Number of stations at which the event was observed 37
Number of stations from which data was used for origin computation 17
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 122564911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-10-30 02:56:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
OT.CGL1.HHZ. 2023-10-30T02:45:22.27 3.0 undecidable manual Sn -6 0
7C.SPAOL.HNZ. 2023-10-30T02:45:08.03 3.0 undecidable manual Pg 15 0
GU.IMI.HHZ. 2023-10-30T02:44:54.62 3.0 undecidable manual Sn 0.4 0
IV.PIPA.HHZ. 2023-10-30T02:44:37.73 3.0 positive manual Pn -2.46 0
IV.MRGE.HHZ. 2023-10-30T02:44:33.52 3.0 positive manual Pn -1.16 0
GU.TRAV.HHZ. 2023-10-30T02:44:26.28 3.0 undecidable manual Pn -0.96 0
IV.ORI.HHZ. 2023-10-30T02:44:23.10 3.0 undecidable manual Pn -8.82 0
IV.MSSA.HHZ. 2023-10-30T02:44:05.37 3.0 undecidable manual Pn 1.67 0
IV.VAGA.HNZ. 2023-10-30T02:44:03.86 3.0 undecidable manual Pg 1.49 0
IV.OSSC.HHE. 2023-10-30T02:44:01.09 0.1 undecidable manual S 217 64.491 50 0.4 85
IV.CRMI.HHZ. 2023-10-30T02:44:00.84 0.1 undecidable manual S 251 63.492 50 0.4 85
IV.MPPT.EHZ. 2023-10-30T02:43:57.13 0.3 undecidable manual S 266 51.0156 50 0.03 71
IV.PII.HHZ. 2023-10-30T02:43:57.92 3.0 negative manual Pg 6.96 0
IV.FAEN.HNZ. 2023-10-30T02:43:55.00 3.0 undecidable manual S 0
IV.MOCL.EHZ. 2023-10-30T02:43:54.90 0.1 undecidable manual S 273 43.7229 50 -0.24 91
IV.BADI.EHE. 2023-10-30T02:43:52.87 0.1 undecidable manual P 142 67.377 50 0.38 85
IV.CSNT.HHZ. 2023-10-30T02:43:52.21 3.0 undecidable manual Sn -1.84 0
IV.SEI.HHZ. 2023-10-30T02:43:51.17 0.1 undecidable manual S 284 30.3474 104 0.1 96
IV.CRMI.HHZ. 2023-10-30T02:43:51.80 0.1 negative manual P 251 63.492 50 -0.1 91
IV.OSSC.HHE. 2023-10-30T02:43:51.74 0.1 undecidable manual P 217 64.491 50 -0.3 87
IV.VISG.HHZ. 2023-10-30T02:43:51.92 0.1 undecidable manual S 314 32.2455 103 0.21 94
IT.MCS.HGE. 2023-10-30T02:43:51.09 0.1 undecidable manual S 89 30.2475 104 0.05 97
IV.BOSL.HHZ. 2023-10-30T02:43:50.80 0.1 undecidable manual S 257 28.9488 105 0.2 95
IV.PARC.HHZ. 2023-10-30T02:43:50.40 3.0 undecidable manual S 0.89 0
IV.MPPT.EHZ. 2023-10-30T02:43:49.68 0.1 negative manual P 266 51.0156 50 -0.29 89
IV.BRSN.HNZ. 2023-10-30T02:43:49.47 0.3 undecidable manual P 40 43.1235 50 0.71 60
IV.RUFI.EHE. 2023-10-30T02:43:49.08 0.1 undecidable manual S 226 24.1536 107 0.07 98
IV.FAEN.HNZ. 2023-10-30T02:43:49.52 3.0 undecidable manual P 0
IV.MTRZ.HHZ. 2023-10-30T02:43:48.77 1.0 undecidable manual P 326 43.2234 50 -0.01 24
IV.MOCL.EHZ. 2023-10-30T02:43:48.45 1.0 positive manual P 273 43.7229 50 -0.39 22
IT.MOG.HNN. 2023-10-30T02:43:48.03 0.3 undecidable manual S 9 20.3685 110 0.27 71
IV.IMOL.EHZ. 2023-10-30T02:43:48.98 3.0 negative manual Pn -1.42 0
IT.FIE.HGE. 2023-10-30T02:43:47.78 0.1 undecidable manual P 240 40.0266 50 -0.5 87
IV.CRE.HHZ. 2023-10-30T02:43:47.75 3.0 undecidable manual S -1.69 0
IT.MCS.HGE. 2023-10-30T02:43:46.19 0.1 undecidable manual P 89 30.2475 104 -0.28 93
IV.BOSL.HHZ. 2023-10-30T02:43:46.08 0.1 positive manual P 257 28.9488 105 -0.14 96
IV.VMGN.HHZ. 2023-10-30T02:43:46.65 0.1 undecidable manual S 256 16.0728 115 0.28 95
IV.SEI.HHZ. 2023-10-30T02:43:46.10 0.1 positive manual P 284 30.3474 104 -0.39 91
IV.VISG.HHZ. 2023-10-30T02:43:46.48 0.1 undecidable manual P 314 32.2455 103 -0.38 91
IT.MRR.HGE. 2023-10-30T02:43:45.50 0.3 undecidable manual S 310 12.9759 120 0.08 75
IV.RINC.EHZ. 2023-10-30T02:43:45.91 0.3 undecidable manual S 220 14.874 117 -0.1 74
IV.RUFI.EHE. 2023-10-30T02:43:45.10 0.1 undecidable manual P 226 24.1536 107 -0.2 96
IT.MOG.HNN. 2023-10-30T02:43:44.51 0.1 undecidable manual P 9 20.3685 110 -0.07 99
IV.RIBO.EHZ.01 2023-10-30T02:43:44.19 3.0 undecidable manual Pg 0.68 0
IV.FRON.EHZ. 2023-10-30T02:43:44.39 3.0 undecidable manual P 4.2 0
IT.MRR.HGE. 2023-10-30T02:43:43.16 0.1 undecidable manual P 310 12.9759 120 -0.07 100
IV.RINC.EHZ. 2023-10-30T02:43:43.66 0.1 positive manual P 220 14.874 117 0.09 99
IV.VMGN.HHZ. 2023-10-30T02:43:43.92 0.1 positive manual P 256 16.0728 115 0.15 98
IV.RM33.HNZ. 2023-10-30T02:43:39.47 3.0 undecidable manual Pn -5.03 0
IV.ARCI.HHZ. 2023-10-30T02:43:37.11 3.0 positive manual P -2.48 0
IV.MCIV.CHZ. 2023-10-30T02:43:36.69 3.0 negative manual P -1.57 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RINC.EHE. ML:1.9 0.00081840495 0.1808 AML other m 2023-10-30T02:43:46.78
IV.VMGN.HHE. ML:1.8 0.000635 1.76 AML other m 2023-10-30T02:43:46.08
IV.RINC.EHN. ML:1.9 0.0009353569999999999 0.1808 AML other m 2023-10-30T02:43:46.65
IV.VMGN.HHN. ML:1.7 0.00047950000000000005 0.28 AML other m 2023-10-30T02:43:47.51
IV.BOSL.HHN. ML:1.3 0.00010355172 0.0992 AML other m 2023-10-30T02:43:51.31
IV.BOSL.HHE. ML:1.2 0.000085660535 0.1408 AML other m 2023-10-30T02:43:51.57
IV.SEI.HHE. ML:2.3 0.0009368096000000001 0.16 AML other m 2023-10-30T02:43:51.65
IV.SEI.HHN. ML:2.5 0.00173 0.22 AML other m 2023-10-30T02:43:51.76
IV.CRE.HHE. ML:2.1 0.00039200000000000004 0.18 AML other m 2023-10-30T02:43:55.30
IV.MOCL.EHN. ML:1.7 0.000168 0.34 AML other m 2023-10-30T02:43:55.67
IV.MOCL.EHE. ML:1.8 0.0002135 0.14 AML other m 2023-10-30T02:43:56.12
IV.MPPT.EHN. ML:1.8 0.00014463290000000002 0.3008 AML other m 2023-10-30T02:43:57.48
IV.IMOL.HNE. ML:2.0 0.00037637755000000003 0.2096 AML other m 2023-10-30T02:43:58.00
IV.IMOL.HNN. ML:1.9 0.00026563895 0.4496 AML other m 2023-10-30T02:44:03.12
IV.MPPT.EHE. ML:1.5 0.00009215 0.6 AML other m 2023-10-30T02:43:58.02
IV.PARC.HHE. ML:1.8 0.000131 0.18 AML other m 2023-10-30T02:43:58.89
IV.CRMI.HHN. ML:1.8 0.000124 1.42 AML other m 2023-10-30T02:44:01.98
IV.CRMI.HHE. ML:1.5 0.00005535 0.34 AML other m 2023-10-30T02:44:01.67
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download